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City of Essex

Sewage treatment plant, Essex, Iowa. NPDES permit IA0026603, in force until Sep 30, 2027. Last 12 months: over a limit 13 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (24 values)
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 13 values over a limit
Period endingParameterReportedLimitOver by
February 2026BOD, carbonaceous [5 day, 20 C], 30-day average31.2≤ 25 mg/L25%
March 2026BOD, carbonaceous [5 day, 20 C], 30-day average36.13333≤ 25 mg/L45%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average40.7≤ 40 mg/L2%
April 2026BOD, carbonaceous [5 day, 20 C], 30-day average39.9≤ 25 mg/L60%
April 2026Solids, total suspended, 30-day average180≤ 80 mg/L125%
April 2026Solids, total suspended, 7-day average180≤ 120 mg/L50%
May 2026BOD, carbonaceous [5 day, 20 C], 30-day average32.9≤ 25 mg/L32%
June 2026BOD, carbonaceous [5 day, 20 C], 30-day average203.0222≤ 188 lb/d8%
June 2026Nitrogen, ammonia total [as N], daily maximum78.10493≤ 39 lb/d100%
June 2026Solids, total suspended, 30-day average832.4988≤ 600 lb/d39%
August 2026BOD, carbonaceous [5 day, 20 C], 30-day average26≤ 25 mg/L4%
August 2026Solids, total suspended, 30-day average125≤ 80 mg/L56%
August 2026Solids, total suspended, 7-day average125≤ 120 mg/L4%

Limits in force (68)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pH30-day averagereport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 600 lb/dall year
Solids, total suspended7-day average≤ 901 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 22 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 18.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 49 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 42 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 23 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 16.4 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 22 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 18.8 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 27 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 18.3 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 22 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 18.8 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 49 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 42 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 23 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 22 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 18.8 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 27 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 18.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 40 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 38 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 39 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 177 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 95 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 47 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 33 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 38 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 37 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 50 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 52 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 35 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 40 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 38 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 39 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 177 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 95 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 47 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 33 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 38 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 39 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 50 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 52 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 35 lb/dNov
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 188 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 300 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0026603 · MCP: https://passage-data.com/mcp